Carburetor-controlling device



July 10, W23.

F. FORNEY ET AL CARBURETOR CONTROLLING DEVICE Filed Oct. 31. 1921 n Fig].

enemies July to, was.

un t eras use r are.

FRANK FORNEY AND ROBERT E. HOFF, 0F DETROIT, MICHIGAN.

CBURETOR-CONTROLLING DEVICE.

Application filed October 31, 1921. Serial No. 511,637.

To all whom it may concern:

Be it known that we, FRANK FoRNEY and ROBERT H. Horn, citizens of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented a new and useful Improvement in Carburetor-Controlling Devices, of which the fol lowing is a specification, reference being had to the accompanying drawing in explaining its nature. I

Our invention is intended for'use upon automobiles and for direct attachment to the instrument board thereof, and is applicable to all automobiles having a carburetor embodying a needle valve for regulating the rate of fuel flow therethrough; it being understood that the above carburetor may also be equipped with the usual throttle connections and choke tube starting devices, with the operation of both of which the present invention has nothing to do.

Many automobile engines have the peculiarity that when cold they are unable to run with the lean mixture which is economical and advantageous when they are warm, and it is common to provide a fuel mixture of increased richness at the time of starting and for the first running of the engine by temporarily opening the needle valve of the carburetor at that time, and it is also common to accomplish this opening by means of a rod reaching from the needle valve to a fitting on the instrument board accessible to the driver. We have found by actual experiment that the amount of this additional opening-of the needle valve necessary to accomplish satisfactory running of the engine when first started from its cold condition is about one-third of a rotation of the needle valve, and our invention has for its object an instrument board device whereby a definite adjustment of this magnitude may be imparted to the carburetor needle. valve; in

which device also is embodied a second and parts of same as such would appear in a.

, longitudinal vertical section of the vehicle,

Fig. 2, is an enlarged elevation of the device separately and Fig. 3 is a side elevatlon central boss 19.

showing the device attached to a section of the instrument board. Of the engine parts indicated, 1, is the cylinder block; 2, the crank case; 3, the oil pan forming the lower part of the crank case; 4, the case over the fly wheel; 5, the covers over the valve mechanism; 6, the cylinderhead block; 7, the intake manifold with the attached carburetor 10; 8, the exhaust manifold; 11, the dash board and 12, the instrument board. Throttle actuating parts are indicated at 13, but the connections thereto are omitted as are also the choke tube connections and hot air intake from the opposite end 14 of the carburetor. The needle valve of the carburetor is of the usual type and is manipulated by its head 15, through a fork ended valve rod 16.

The body of our device is of sector like form consisting of an are shaped upper member 17, united b radial ends 18 with a ithin the boss a short shaft 20 is rotatably carried, the front end of which projects slightly forward, through and beyond the instrument board and this shaft end is by universal joints 21 and intermediate rod length 22, having bearing in the dashboard, connected with the fork ended valve rod section 16.

Upon the end of the shaft 20 rearwardly projecting from the boss 19 is secured a dial disc 23, the peripheral notches 24 of which are engaged by a latch pin 25, carried by an operating lever 26, pivoted upon the sha 20, between the dial disc 23 and the body boss 19. The operating lever carries the latch pin in the plane of the dial disc in a boss 27, and the outer end of the latch pin is provided with an enlarged head 28,'by which it may be raised from engagement with the dial disc, also the latch pin is provided with a spring 29 holding it in engage ment with the dial disc and also provided with a cross in 30 entering a radial notch of the boss 2 By this head 28, the latch pin may be withdrawn from engagement with the dial disc, and the latch pin may be held in this withdrawn position by rotating slightly so that the cross pin 30 comes over uncut portions of the end of boss 27.

The operating lever 26, is provided with a handle 31 by which it is moved and this handle is located on the arm so as to swing over the are shaped portion 17 of the body. Within the handle 31 is carried a spring actuated index pin 32 whose rounded end enters conical indexing indentations 33, formed in the are shaped portion 17. The movement of the operating lever is limited by stops 34: raised upon the radial body parts 18 to about one third of a revolution, and two of the indexing indentations 33, are positioned to receive the index pin 32 when the lever 26 is in these extreme positions, the third indentation being located substantially midway between.

It is obvious that, the latch pin 25, being in engagement with the dial disc 23, that upon operating the lever 26 back and forth between the extremes of motion determined by the steps 34, that the needle valve 15 will be rotated back and forth a like amount by ,reason of the rod connection 22, 16, to the shaft 20. It is also obvious that, the operating lever 26 remaining stationary in any position, that the needle valve may be changed or adjusted as to its opening by rotating the dial disc 23 a corresponding amount under the latch pin 25.

The correct setting of ur device is obtained as follows: The operating lever 26 is moved to the extreme right hand side asregarded in. Fig. 2, this being the position for continuous running of the engine after the same has been warmed up. The operating lever remaining in this position the needle valve 15 is adjusted by the dial disc so that the engine performance is satisfactory in its headed running condition.

Having been set as above. the operation.

of our device is as follows While the engine is being started and until the engine reaches its running temperature, the operating lever is placed and remains at the extreme left. After the engine has acquired its running temperature the swinging armis moved to the right hand side and allowed to remain there.

The design illustrated provides foropening the needle valve about one third of a turn forstarting ,more than-it is open for running.

Y It will be'observed that this device alters the carburetor needle adjustment between positive limits determined by the design of the device, that; the amount of such needle adjustment alteration is always the same and that the device may be operated by the sense of feeling alone. While conical indexing indentations 33 placed at the extremes of throw of the lever 26 are all that are necessary for the successful operation of the device, a third indentation is added placed midway between them by the use of which the alteration in the needle adjustment may be made more gradually if the operator so desires,

By the use of this device the automfioile may be put into use immediately upon starting the engine and without waiting for the engine to warm up thus obtainin .some mileage from fuel otherwise not use except for heating and saving a corresponding amount of operative time.

What we claim and desire to secure by Letters Patent are In a carburetor controlling device an 1nstrument-board base 'comprisin an are shaped indexing strip with indexing inden tat-ions therein, united by radial strips at its ends with a central boss, a shaft turning in said boss and connected at one end to the needle valve of acarburetor and having a dial disc fast upon the other, and an operating lever pivoted upon the said shaft, said lever being provided with a latch pin engaging said dial disc and also provided with an index pinthe said are shaped indexing strip; the said base being provided also with raised stops engaging the indentations of in the path of motion of the said operating lever.

FRANK FORNE-Y. I -ROBERT H. HOFF. 

